On 9 September 2009, [British illusionist] Derren Brown conducted a live TV broadcast in which he suggested that he had successfully predicted the winning National Lottery numbers prior to them being drawn. During the broadcast a number of blank lottery balls were displayed on a glass stand in clear view of the camera, and after the lottery draw had been made, the balls were rotated to reveal the winning numbers. It was claimed by Derren Brown that the only other people in the studio were two camera operators, to avoid legal issues, and that the stunt had been authorised by Camelot, the National Lottery operators.

He claimed it was based on an old trick which tells how a crowd of people at a country fair accurately estimated the weight of an ox when their guesses were all averaged out. He gathered a panel of 24 people who wrote down their predictions after studying the last year’s worth of numbers. Then they added up all the guesses for each ball and divided it by 24 to get the average guess. On the first go they only got one number right, on the second attempt they managed three and on the third they guessed four. By the time of last week’s draw they had honed their technique to get six correct guesses, and these were the numbers shown on the Wednesday night programme. [Derren] Brown claims that the predictions were correct because of the “wisdom of the crowd” theory which suggests that a large group of people making average guesses will come up with the correct figure as an average of all their attempts. He also suggested that if the people were motivated by money, it may not work.